Research

Weave Analysis and Performance: The Washington State Case Study

This research study summarizes current practices for weaving section design and their development from a literature review. Current methodologies and modeling techniques were assessed and then tested with actual characteristics of a major weave section in Washington State. The analysis compared estimated level of service of the techniques for the weaving section and on alternative designs to consider operational improvement opportunities. A safety analysis for collision type and severity was conducted on the accidents through the weaving section, with predicted effects for the alternative designs. The study recommends that weaving sections undergo critical review of traffic projections and roadway characteristics before implementation to avoid operational impacts that can stretch beyond the localized section. Further research on the safety impacts in weaving sections is also recommended.